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115. A diesel engine with a full speed of 1000 RPM drives a propeller at 300 RPM. What is the speed reduction ratio?
The speed reduction ratio is calculated by dividing the engine speed by the propeller speed, which is 1000 RPM / 300 RPM ≈ 3.33 to 1. This indicates the engine rotates approximately 3.33 times for each propeller rotation.
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